Kepler's second law

Noun

1.

Kepler's second law - a law concerning the speed at which planets travel; a line connecting a planet to the sun will sweep out equal areas in equal times; "Kepler's second law means that a planet's orbital speed changes with its distance from the sun" Synonyms: law of areas, law of equal areas

Kepler's law, Kepler's law of planetary motion, law of areas, law of equal areas